Egg White Lysozyme for Food Preservation

What is lysozyme in a food plant context? It is an antimicrobial enzyme, commonly sourced from egg white, that hydrolyzes beta-1,4 linkages in peptidoglycan within bacterial cell walls. The main lysozyme function is therefore strongest against many Gram-positive bacteria, while Gram-negative organisms may require additional hurdles because their outer membrane limits access. For B2B buyers, egg white lysozyme is not positioned as a supplement or medical ingredient; it is a processing aid or food preservative ingredient subject to local regulatory and labeling requirements. Commercial forms may be described as lysozyme, lysozyme enzyme, lysozyme protein, protein lysozyme, or lysozyme chloride depending on supplier terminology and salt form. In preservation systems, it is typically evaluated alongside pH control, salt, temperature, hygiene, starter cultures, filtration, and packaging. The practical question is not whether lysozyme works in theory, but whether it delivers measurable microbial control in the target matrix.

Primary target: Gram-positive spoilage and process-risk organisms. • Common source: egg white, requiring allergen review. • Best used as part of a validated hurdle system.

Treat pH, temperature, salt and contact time as one package. A stated optimum, such as the pH 6.0–9.0 and 37°C–50°C working range we give for our powder, does not apply unchanged to every matrix; wine behaves differently from milk or brine. Temperature management is one of the most common lysozyme troubleshooting points. Like other proteins, lysozyme can lose activity when exposed to excessive heat, long hot holds, or aggressive processing conditions, so do not assume it survives pasteurization, cooking, spray drying or hot filling without supplier data and plant validation. In many preservation workflows the best addition point is after the main heat step, during a controlled cooling or blending stage where mixing is adequate. Hold time should be long enough for enzyme contact before downstream separation, filtration, or packaging. Set the dose by a dose-response trial in your own product and align it with local food regulations and allergen labeling obligations.

Screen pH, temperature, contact time, and salt level together. • Avoid dosing immediately before a step that removes or denatures the enzyme. • Map actual tank temperature and residence time. • Use microbial challenge data rather than label activity alone.

Pilot validation should be designed as a dose-response study rather than a single confirmation batch. Run an untreated control, a low dose, a target dose, and a high dose under the same raw material and process conditions. For food preservation, define success in advance: reduced spoilage organisms, delayed gas formation, stable acidity, reduced defect rate, or extended shelf life without unacceptable sensory change. Sampling should cover post-addition, post-processing, early storage, mid-shelf-life, and end-of-shelf-life points. In cheese, monitor curd behavior, moisture, salt, pH, starter performance, eye formation, and defect incidence. In wine, monitor lactic acid bacteria, malolactic status, haze risk, filtration behavior, color, aroma, and mouthfeel. Scale-up should confirm mixing energy, addition point, powder hydration or solution preparation, and residence time. A successful benchtop result is only purchasing evidence after pilot and plant data confirm repeatability.

Use controls and multiple dosage levels. • Define pass/fail criteria before the trial. • Repeat with normal raw material variation.

If lysozyme protein is not delivering the expected preservation effect, investigate the full process before changing supplier or increasing dosage. First, confirm that the target organism is lysozyme-susceptible and that initial contamination is within the intended control range. Next, check whether the enzyme was stored correctly, dispersed fully, and added at the validated process step. Review pH, temperature exposure, salt level, and competing matrix components. Compare the actual lot COA activity with the trial lot used during development. Revisit sampling points: a poor mixing pattern can make one sample look compliant and another fail. For beverages such as wine or for cheese applications, confirm that the target microorganisms and sensory constraints match the original validation. Escalate only after documenting deviations, running a controlled repeat, and calculating whether a revised dose is commercially justified.

Verify organism susceptibility and baseline microbial load • Check storage, hydration, dispersion, and addition sequence • Compare plant conditions with pilot validation records • Review COA activity and lot-to-lot variation • Use controlled repeat trials before changing specification

Tell us the product you make, the process step where lysozyme will go in, the batch size, the quantity you expect per order or per year, and the destination country. Distributors and resellers can request the same way for their customers' applications. We reply within 24 hours with sample availability, COA and a quote; packs are 1 kg, 5 kg and 25 kg.